

Please login to leave a review:
Loading reviews...
The new generation GR-4 is an advanced ground scanning and detector system that allows you to detect underground anomalies, perform 3D analysis, and instantly evaluate the results. COMING SOON!
3D Scanning Made Simple | In Stock & Ready to Ship
“Locate hidden rooms, tunnels, and deep treasures up to 15 meters with your smartphone.”
| Brand: | Groundtech |
|---|---|
| Max Depth: | 15 Meters |
| Search Systems: | 3D Ground Scan, Live Scan, Pinpointer |
| Made In: | Turkey (Conrad Engineering) |
| Tech: | Smart 3D CN-D Sensor |
| Warranty: | 2 Years |
| Shipping: | Free Worldwide Express |
The Groundtech GR-4 is designed for treasure hunters who need a lightweight, stealthy device without compromising on depth. Unlike traditional heavy detectors, the GR-4 is a “stick” sensor that connects wirelessly to your tablet or phone.
Using advanced sensor technology, it visualizes the underground in 3D, allowing you to see the difference between voids (caves, tunnels) and metals before you start digging.
| Feature | GR-4 (Standard) | GR-4 Dual |
|---|---|---|
| Technology | 3D Ground Sensor (Magnetic) | 3D Sensor + Pulse Induction (PI) |
| Best For | Deep voids, tunnels, cellars, large caches | All Standard features + Single coins & Gold rings |
| Discrimination | Via 3D App Analysis | Audio/LED (Iron vs Gold) |
| Detection Modes | 3 (3D Scan, Live, Pinpointer) | 4 (Plus Detector Mode) |
The GR-4 is equipped with high-sensitivity sensors that allow you to scan the ground in three different ways via the G-Portal App:
| I. System & Sensor Technology | |
| System Type | 3D Ground Scanner & Vertical Mining Detector |
|---|---|
| Sensor Technology | MFS-2 Dual Sensor Technology (Gradiometer) |
| Sensor Sensitivity | ± 2000 µT |
| Scanning Modes | 3D Ground Scan, Live Scan, Pinpointer |
| A/D Converter | 12-bit High Resolution |
| Detection Depth | Up to 15 Meters |
| II. Hardware & Power | |
| CPU Frequency | 240 MHz (High Speed Core) |
| Communication | Bluetooth 4.2 BLE (Low Energy) |
| Battery Type | Built-in 3.7V Li-ion Rechargeable |
| Operating Time | Approx. 10 Hours (Continuous) |
| Charging Input | Type-C USB (25W Fast Charging) |
| Operating Temperature | 0°C to 70°C |
| Storage Temperature | -20°C to 60°C |
| III. Physical & Software | |
| Construction | ABS Plastic & Aluminum Body |
| Design Factor | Foldable Modular Structure (Adjustable Grip) |
| Weight | approx. 600 g (Ultra-Lightweight) |
| Dimensions | 810 x 70 x 70 mm |
| Languages | Device: 11 Languages / App: 25 Languages |
| 3D Visualization | Full 3D/4D Analysis Graphs |
| Warranty | 2 Years Manufacturer Warranty |
The GR-4 leverages the powerful G-Portal application to turn your smartphone into a professional workstation. Rotate, filter, and zoom into 3D underground models in real-time. Compatible with the latest Android and iOS hardware.
Maintenance & Updates:
Connect your device via Bluetooth 4.2 to sync scan data or update firmware directly through the app.
Do I need to be an expert to use the GR-4?
No, the GR-4 is designed for “Start and Go” operation. The G-Portal app is user-friendly, and the device calibrates automatically to the soil.
Can I use this for finding single coins?
The GR-4 is a 3D Ground Scanner specialized for larger, deeper objects (voids, chests). For single coin hunting on the surface, we recommend the GR-4 Dual model, which includes a Pulse Induction Metal Detector mode specifically for that purpose.
Is the tablet included?
The device connects to your own Android or iOS smartphone/tablet. This keeps the device lighter and allows you to use a screen you are already comfortable with.
| SKU | Conrad-GR4 |
|---|
Experience the future of metal detection with Goldot "your trusted partner in discovery since 2005."
Join our exclusive network for the latest tech insights and offers.
© 2026 Goldot-Tec. All rights reserved.